P1246 Mazda Code - Alternator Load Input Failed
Quick Answer
The Powertrain Control Module (PCM) monitors generator load from the generator/regulator in the form of frequency. Common causes include Faulty Alternator/Generator, Alternator/Generator harness is open or shorted, Alternator/Generator circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1246 Mazda indicates Alternator Load Input Failed.
- Common causes
- Common causes include Faulty Alternator/Generator, Alternator/Generator harness is open or shorted, Alternator/Generator circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1246 Mazda Description
What are the Possible Causes of the DTC P1246 Mazda?
- Faulty Alternator/Generator
- Alternator/Generator harness is open or shorted
- Alternator/Generator circuit poor electrical connection
- Damaged Powertrain Control Module (PCM)
How to Fix the DTC P1246 Mazda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1246 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1246 Mazda Code
1. What does the OBDII code P1246 mean for a Mazda?
P1246 indicates that the alternator load input signal to the Powertrain Control Module (PCM) has failed or is out of range.
2. What are the common symptoms of code P1246 in a Mazda?
Symptoms include a charging system warning light, dim or flickering headlights, a dead battery, or the vehicle stalling while driving.
3. What causes the P1246 code to appear in a Mazda?
Common causes include a faulty alternator, damaged wiring or connectors in the alternator circuit, a defective PCM, or a weak battery.
4. Can a bad alternator trigger the P1246 code?
Yes, a malfunctioning alternator is one of the primary causes of the P1246 code.
5. How do you diagnose the P1246 code in a Mazda?
Diagnosis involves checking the alternator's output, inspecting wiring and connectors for damage, testing the battery voltage, and using a scan tool to monitor the alternator load signal.
6. Can I continue driving my Mazda with the P1246 code?
Driving with this code is not recommended, as it can lead to a drained battery and potential stalling, which could leave you stranded.
7. How is the P1246 code fixed in a Mazda?
Repairs may include replacing the alternator, repairing or replacing damaged wiring or connectors, or, in rare cases, replacing the PCM.
8. How much does it cost to fix the P1246 code in a Mazda?
Repair costs vary but typically range from $200 to $600, depending on whether the alternator, wiring, or PCM needs replacement.
9. Can a weak battery cause the P1246 code to appear?
Yes, a weak or failing battery can cause the alternator to behave abnormally, potentially triggering the P1246 code.
10. Is the P1246 code specific to Mazdas, or can it occur in other vehicles?
While the P1246 code is commonly associated with Mazdas, a similar code may appear in other vehicles with different definitions or causes.
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